That folded tweeter is quite good even if you're coming from ESLs (I have a pair of Motion4 and Motion10 that use it) as it plays loudly effortlessly and has narrow vertical dispersion. And I just love a woven fiber cone for the mids and aluminum cones for bass, so this is a great update on the old-fashioned 3-way box speaker.
I didn't watch the whole video, but did they point out how useful it is to bi-amp them?